dzhokhar tsarnaev. how do you know him, tell us anything you know about him. >> i went to high school with dzhokhar. i knew him as dzhokhar. he graduated below me. he was good friends, worked at harvard university as a lifeguard. yeah, we partied, good high school friends, and a bunch -- all of my high school -- everybody, we're all like in shock. there is no telltale signs of any kind of malicious behavior from dzhokhar. it's coming as a shock really. >> what town did he live in? can you tell us about his family? anything you may know about his life. >> well, we -- i live on columbia street which is just a street over from norfolk street, so, i mean, he lived literally maybe a block away from me. i mean, as far as i know, i didn't know his close personal family, but i mean, i knew dzhokhar, and he didn't show any malicious sign, no evidence that would lead any of to us really believe he would be capable of something like this. >> did you know his older brother. one that was killed in a fire fight with